Table 2 Survival of patients with p-stage III/N2 NSCLC by a univariate analysis (log-rank test)

Age

   <75 years

91

32.0

0.3519

   ≥ 75 years

30

39.5

Gender

   Male

89

33.0

0.3981

   Female

32

40.2

T factor

   T1

27

47.8

0.0125

   T2-4

94

30.8

Histology

   Adenocarcinoma

63

41.0

0.0637

   Others

58

28.2

Surgical procedure

   Pneumonectomy/bilobectomy

34

20.7

0.0345

   Lobectomy

87

40.1

Skip metastasis

   Yes

41

41.7

0.2156

   No

80

30.1

Number of involved lymph nodes

   1 or 2

37

55.2

0.0041

   3≤

84

24.7